public static void Init(float[,] heights)
{
var vertices = new List <Vector3>();
var elements = new List <int>();
var colours = new List <Color4>();
for (int i = 0; i < heights.GetLength(0); i++)
{
for (int j = 0; j < heights.GetLength(1); j++)
{
float x = i - (float)heights.GetLength(0) / 2;
float y = j - (float)heights.GetLength(1) / 2;
float z = heights[i, j];
vertices.Add(new Vector3(x, y, z));
colours.Add(new Color4((float)Math.Sin(i) / 2, 0.2f, 0.5f, 1));
}
}
for (int i = 0; i < heights.GetLength(0) - 1; i++)
{
for (int j = 0; j < heights.GetLength(1) - 1; j++)
{
int topleft = i * heights.GetLength(1) + j;
int topright = topleft + 1;
int bottomleft = (i + 1) * heights.GetLength(1) + j;
int bottomright = bottomleft + 1;
elements.AddRange(new int[] { topleft, bottomleft, topright, topright, bottomleft, bottomright });
}
}
VAO vao = new VAO(vertices.ToArray(), colours.ToArray(), elements.ToArray());
model = new Model(vao, BeginMode.Triangles);
}
public static Model CreateRectangle(Vector2 size, Vector4[] colours)
{
Vector2[] vertices = new Vector2[] { new Vector2(-1, 1), new Vector2(-1, -1), new Vector2(1, -1), new Vector2(1, 1) };
int[] elements = new int[] { 0, 1, 2, 0, 3 };
VAO vao = new VAO(vertices, colours, elements);
return(new Model(vao, BeginMode.TriangleStrip, size));
}
public static Model CreateRectangle(Color4[] colours)
{
Debug.Assert(colours.Length == 4);
Vector3[] vertices = new Vector3[] { new Vector3(0, 0, 0), new Vector3(0, 1, 0), new Vector3(1, 1, 0), new Vector3(1, 0, 0) };
int[] elements = new int[] { 0, 1, 2, 2, 3, 0 };
VAO vao = new VAO(vertices, colours, elements);
return(new Model(vao, BeginMode.Triangles));
}
public static Model CreateCube(Color4[] colours)
{
Debug.Assert(colours.Length == 8);
Vector3[] vertices = new Vector3[] {
new Vector3(-1.0f, -1.0f, 1.0f),
new Vector3(1.0f, -1.0f, 1.0f),
new Vector3(1.0f, 1.0f, 1.0f),
new Vector3(-1.0f, 1.0f, 1.0f),
new Vector3(-1.0f, -1.0f, -1.0f),
new Vector3(1.0f, -1.0f, -1.0f),
new Vector3(1.0f, 1.0f, -1.0f),
new Vector3(-1.0f, 1.0f, -1.0f)
};
int[] elements = new int[] {
0, 1, 2,
2, 3, 0,
1, 5, 6,
6, 2, 1,
7, 6, 5,
5, 4, 7,
4, 0, 3,
3, 7, 4,
4, 5, 1,
1, 0, 4,
3, 2, 6,
6, 7, 3
};
VAO vao = new VAO(vertices, colours, elements);
return(new Model(vao, BeginMode.Triangles));
}
public Model(VAO vao, BeginMode drawmode)
{
this.vao = vao;
this.drawmode = drawmode;
}
public Model(VAO vao, BeginMode drawmode, Vector2 size)
{
this.vao = vao;
this.drawmode = drawmode;
this.size = size;
}
